Dude, it’s right there in the first sentence.
duh! (you’re right)
The first sentence is a trick sentence. It does not say that the gun was a F&F gun, only that Phoenix was a F&F city. The description of the gun’s history doesn’t look like F&F to me, rather just an illegal personal sale. We’ll see. Or not.
Dude, read the fourth paragraph in the whole story. “It’s not clear”.